SONY SS-X300 ￥25,000(1台、1981年発売)

Model rating System 2 ways, 2 speakers, bass reflex system, bookshelf type unit for low range: 170 cm2 flat type
For high region: 9cm2 flat type effective frequency band 50Hz to 20000Hz Output sound pressure level 89dB / W / m impedance 6Ω Rated maximum input 50W Instant maximum input 100W Crossover frequency 2kHz External dimensions width 215x height 360x depth 230mm weight 6.0kg included speaker Cord (2.5m)